Low-Profile Aesthetic – Blends seamlessly with any letterbox design.
Code-Reset Tool – SIM-pin tool for quick, secure password changes.
Description
Battery-Free Letterbox Lock for HDB & Condo Mailboxes
Change your HDB letterbox lock with our digital letterbox lock, a battery-free and keyless solution tailored for HDB, BTO, resale flats and condo letterboxes. This letterbox lock eliminates the hassle of replacing batteries and carrying keys, offering a convenient and reliable way to secure your mail.
Made from premium zinc alloy, this letterbox lock provides enhanced durability and long-term security. Its easy-to-use 3-digit combination ensures hassle-free access while maintaining a sleek and modern design. Ideal for urban living, this digital lock for letterboxes is perfect for Singapore residents looking for a low-maintenance yet secure option.
Priced at just $80, including installation, this affordable digital number lock is a simple yet impactful upgrade to your home. Whether you're securing an HDB or condo letterbox, enjoy the benefits of a high-quality letterbox lock that delivers both peace of mind and convenience.
Whether you need a letterbox lock for an HDB flat or a digital lock for letterbox in a condo, our design delivers low-maintenance, high-security performance. Say goodbye to keys, batteries, and bulky hardware—upgrade today for seamless mail protection.
The lock ships with a default code of 0-0-0.
- Ensure the lock is open (default code is 0-0-0).
- Find the pin hole on the side of the front lock turntable.
- Insert a pointed tool (e.g., SIM-tray pin) into the hole and hold.
- If it does not give, turn the knob slightly and retry.
- While holding, set your new 3-digit code and release to confirm.
Yes—our dimensions match standard HDB mailbox lock cutouts.
We recommend our $80 installation package for perfect alignment and warranty coverage.
No—being battery-free and fully mechanical, it only needs occasional cleaning for optimal performance.
How Does Our Letterbox Lock Work?
This combination lock for letterbox relies on precision-engineered dials that engage a mechanical latch inside the zinc-alloy housing. Each numbered wheel must align to the correct 3-digit code before the latch retracts, ensuring both reliability and longevity. Without batteries or electronics, the lock is impervious to power failures and battery-related maintenance—ideal for a letter box lock Singapore solution that works year after year.
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